>>> right now at 5:00, overnight fire burned the law office of the mayor. while the fbi is now getting involved. we'll have a live report on that. >>> also, the heat warning in the bay area. how the hottest temperatures of the year could be harmful to your health. >>> and we'll introduce you to a fifth grader from the tenderloin who made it to one of the nation's biggest stages through poetry and sports. >> good evening. federal agents are being called to investigate a fire that gutted the offices of the major of vallejo. it could be a case of domestic terrorism. we just spoke to police. he had the latest from vallejo for us. monte? >> good evening. vallejo police say the mayor is a high-profile figure and that's why they called in the fbi. and police are reviewing surveillance footage taken by a camera on a building across the street from the offices to figure out who might have set this fire. these offices are owned and they just showed up at the scene early this morning to see the damage that had been done and he shed a few tears upon seeing what had hap